#include<iostream>
using namespace std;
int main(){
int len;
cin>>len;
// har len ko even bna ke
int n=(len+1)/2;
for(int i=1;i<=n;i++){
    for(int j=1;j<=i;j++){
        cout<<"*";
    }
for(int j=1;j<=2*n - 2*i;j++){
    cout<<" ";
}
for(int j=1;j<=i;j++){
    cout<<"*";
}
cout<<endl;

}
for(int i=n-1;i>=1;i--){
    for(int j=1;j<=i;j++){
        cout<<"*";
    }
for(int j=1;j<=2*n - 2*i;j++){
    cout<<" ";
}
for(int j=1;j<=i;j++){
    cout<<"*";
}
cout<<endl;

}

}